wp_iso_descrambler( string $subject ): string

Source

function wp_iso_descrambler( $subject ) {
	/* this may only work with iso-8859-1, I'm afraid */
	if ( ! preg_match( '#\=\?(.+)\?Q\?(.+)\?\=#i', $subject, $matches ) ) {
		return $subject;
	}

	$subject = str_replace( '_', ' ', $matches[2] );
	return preg_replace_callback( '#\=([0-9a-f]{2})#i', '_wp_iso_convert', $subject );
}

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